GM Service Manual Online
For 1990-2009 cars only

Object Number: 1864045  Size: MF

Callout

Component Name

Preliminary Procedures

  1. Turn the ignition switch to the OFF position.
  2. Apply the brake pedal several times until the brake pedal becomes firm to deplete the power brake booster vacuum reserve.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

1

Power Brake Booster Vacuum Sensor Electrical Connector

2

Power Brake Booster Vacuum Sensor

Tip
If necessary, a small amount of denatured alcohol can be used as an assembly aid for installing the power brake booster vacuum sensor to the brake booster. Do not use soap.